CN207458724U - The excitatory extra-high voltage auto-transformer of pressure regulation - Google Patents
The excitatory extra-high voltage auto-transformer of pressure regulation Download PDFInfo
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- CN207458724U CN207458724U CN201721404303.5U CN201721404303U CN207458724U CN 207458724 U CN207458724 U CN 207458724U CN 201721404303 U CN201721404303 U CN 201721404303U CN 207458724 U CN207458724 U CN 207458724U
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Abstract
The utility model is related to a kind of excitatory extra-high voltage auto-transformers of pressure regulation, using single-phase three rod structure, i.e. there are one column, field winding, public winding, series connection winding, low pressure winding and tap-changing windings by iron core principal post, two iron cores for tool, wherein, it is by interior coils arrangement outward on iron core principal post：Field winding, public winding and series connection winding；It is by interior coils arrangement outward on column by an iron core by two iron cores in column：Low pressure winding, tap-changing windings；Tap-changing windings both ends are in parallel with field winding both ends.The utility model is tap-changing windings excitation mode, and tap-changing windings and field winding are in parallel, and tap-changing windings are positioned over other column, is conducive to the outlet arrangement of pressure regulation lead, can effectively reduce the width of magnetizing coil to reducing the material cost of each winding of iron core principal post.
Description
Technical field
The utility model is related to a kind of Transformer Manufacturing Technologies, are specially a kind of excitatory extra-high voltage auto transformation of pressure regulation
Device.
Background technology
With the rapid development of electric system, extra-high voltage auto-transformer is a kind of common power equipment, and extra-high voltage exists
The effect played in power grid also increasingly receives the concern of people.
At present, the voltage of domestic extra-high voltage auto-transformer and capacity are generally all larger, and structure type has five rod structures,
There are four rod structures.According to the difference of transformer capacity, the structure that transformer is chosen is also different.
At present, what substation considered is only the state of high pressure operation, and transformer transformer mesolow and height
It presses under operating status overwhelming majority situation without the concern in this case, it is only to keep away that low pressure winding, which is connected into corner connection coil,
Exempt from the influence of triple-frequency harmonics, and the capacity of original low pressure winding still designs bigger, can only be placed on iron core principal post, because of resistance
It anti-relation and must necessarily be placed in most inboard, it is ensured that insulation distance adds radial size, also increases manufacture cost.
Utility model content
For the deficiencies of extra-high voltage auto-transformer low pressure winding capacity in the prior art is big, manufacture cost, this practicality is newly
Type will solve the problems, such as to be to provide a kind of excitatory extra-high voltage auto-transformer of pressure regulation that can effectively reduce manufacture cost.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
The excitatory extra-high voltage auto-transformer of a kind of pressure regulation of the utility model, using single-phase three rod structure, i.e., there are one tool
Column, field winding, public winding, series connection winding, low pressure winding and tap-changing windings by iron core principal post, two iron cores, wherein, iron
It is by interior coils arrangement outward on core principal post：Field winding, public winding and series connection winding；One by two iron cores in column
It is by interior coils arrangement outward on column by iron core：Low pressure winding, tap-changing windings；Tap-changing windings both ends and field winding both ends are simultaneously
Connection.
Each shunting tap of tap-changing windings is connected to on-load voltage regulating switch, the electric current leading-out terminal connection of the on-load voltage regulating switch
Neutral bushing, polarity selector are connected with public winding end.
Winding connect to be connected in series again with public winding after two winding parallels.
The utility model has the advantages that and advantage：
1. the utility model is neutral point variable flux voltage variation (VFVV) mode, solves loaded switch and chosen since voltage class is high
Less than the problem of, while neutral point insulation level is low, is conducive to the selection of low-voltage-grade on-load voltage regulating switch, greatly reduces
Switch cost.
2. the utility model is tap-changing windings excitation mode, tap-changing windings and field winding are in parallel, and tap-changing windings are put
Other column is placed in, is conducive to the outlet arrangement of pressure regulation lead.
3. the utility model is tap-changing windings excitation mode, tap-changing windings and low pressure winding dielectric level are low, are conducive to side
The difficulty of the main minor insulation of each winding of column is also beneficial to the selection of the low insulation level of the pressure regulation lead of switch；Field winding simultaneously
The outside diameter close to iron core principal post is positioned over, can effectively reduce the width of magnetizing coil to reducing each winding of iron core principal post
Material cost.
4. the utility model the utility model is simple in structure, insulation performance parameter stability, it disclosure satisfy that the insulation of client will
It asks.
Description of the drawings
Fig. 1 is the utility model extra-high voltage auto-transformer winding connection schematic diagram；
Each winding arrangement structure schematic diagram of Fig. 2 the utility model iron core inside transformer principal posts；
Each winding arrangement structure schematic diagram of column by Fig. 3 the utility model iron core inside transformer.
Wherein, LV low pressure windings, TV are tap-changing windings, and CV is public winding, and SV is series connection winding, and JC is field winding.
Specific embodiment
The utility model is further elaborated with reference to Figure of description.
The utility model is a kind of extra-high voltage single-phase autotransformer, and due to low pressure capacity very little, low pressure capacity is about complete
1 the percent of rated capacity, what is selected in design principle is single-phase three rod structure, using neutral point variable flux voltage variation (VFVV) mode,
This mentality of designing greatly reduces the space of transformer, also reduces the material and cost of the type transformer, while also full
The foot requirement of the performance parameter of client.
If Fig. 1~3 show, a kind of excitatory extra-high voltage auto-transformer of pressure regulation of the utility model, using single-phase three rod structure,
I.e. tool is there are one column by iron core principal post and two iron cores, also with field winding JC, public winding CV, series connection winding SV, low pressure
Winding LV and tap-changing windings TV, wherein, it is by interior coils arrangement outward on iron core principal post：Field winding JC, public winding CV
And series connection winding SV；It is by interior coils arrangement outward on column by an iron core by two iron cores in column：Low pressure winding LV, adjust
Press winding TV；Between core mandrel and each winding of other column, tap-changing windings both ends are in parallel with field winding both ends.Column by another iron core
On do not set winding.
As shown in Figure 1, embodying each coils arrangement relation of transformer, the connection between the winding of each transformer is also embodied
Relation.The utility model uses neutral point variable flux voltage variation (VFVV) mode, and loaded switch electric current leading-out terminal connects neutral bushing O,
Public winding CV ends connect the polarity selector K of on-load voltage regulating switch.
In transformer high-voltage-middle pressure operation, when adjusting the operating position of loaded switch, middle pressure winding is changed accordingly
With the number of turn of high-voltage winding, the adjusting of high-voltage winding voltage is realized.Iron core principal post ampere-turn is analyzed：Winding is pressed in the utility model
Voltage request is constant, therefore middle pressure winding current is constant, due to the variation of tap position, changes the middle number of turn for pressing winding, and then
Change the ampere-turn of middle pressure winding and the product of electric current；When the tap position of on-load voltage regulating switch changes, the electricity of field winding JC
Stream changes also with the change of tap position, and the direction of excitation current is then determined by the ampere-turn of middle pressure winding ampere-turn and high-voltage winding
It is fixed.
In the present embodiment, the utility model is high-pressure side on-load voltage regulation, and series connection winding voltage is 765kV, and public winding is electric
It presses as 400kV, it will be seen from figure 1 that this extra-high voltage transformer has following key problem in technology point：
1) in selecting on-load voltage regulating switch, the utility model uses neutral point variable flux voltage variation (VFVV) mode, circle potential and iron core
Flux density is changed with the variation of pressure regulation tap；2) single-phase three rod structure is employed；3) since low pressure capacity is smaller, because
This, low pressure winding is placed on other column；4) tap-changing windings excitation mode is used.
In the utility model, the capacity of low pressure winding can be very small, in design moves on to low pressure winding on other column, and
Middle pressure winding and high-voltage winding device body then can further become smaller, and the performance parameter of customer requirement both met, also to actual life
Production can be good at reaching change with a kind of Analyzing on Building A Planning Scheme of extra-high voltage auto-transformer of simple structure and low cost
Depressor reduces the purpose of cost.
Claims (3)
1. a kind of excitatory extra-high voltage auto-transformer of pressure regulation, it is characterised in that：Using single-phase three rod structure, i.e., there are one iron for tool
Column, field winding, public winding, series connection winding, low pressure winding and tap-changing windings by core principal post, two iron cores, wherein, iron core
It is by interior coils arrangement outward on principal post：Field winding, public winding and series connection winding；An iron by two iron cores in column
It is by interior coils arrangement outward on column by core：Low pressure winding, tap-changing windings；Tap-changing windings both ends are in parallel with field winding both ends.
2. by the excitatory extra-high voltage auto-transformer of pressure regulation described in claim 1, it is characterised in that：Each tap of tap-changing windings
Tap is connected to on-load voltage regulating switch, the electric current leading-out terminal of on-load voltage regulating switch connection neutral bushing, polarity selector with
Public winding end connects.
3. by the excitatory extra-high voltage auto-transformer of pressure regulation described in claim 1, it is characterised in that：Connect winding for two around
It is connected in series again with public winding after group is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721404303.5U CN207458724U (en) | 2017-10-27 | 2017-10-27 | The excitatory extra-high voltage auto-transformer of pressure regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721404303.5U CN207458724U (en) | 2017-10-27 | 2017-10-27 | The excitatory extra-high voltage auto-transformer of pressure regulation |
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| Publication Number | Publication Date |
|---|---|
| CN207458724U true CN207458724U (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721404303.5U Active CN207458724U (en) | 2017-10-27 | 2017-10-27 | The excitatory extra-high voltage auto-transformer of pressure regulation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109727753A (en) * | 2017-10-27 | 2019-05-07 | 特变电工沈阳变压器集团有限公司 | A kind of extra-high voltage auto-transformer of pressure regulation excitation |
-
2017
- 2017-10-27 CN CN201721404303.5U patent/CN207458724U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109727753A (en) * | 2017-10-27 | 2019-05-07 | 特变电工沈阳变压器集团有限公司 | A kind of extra-high voltage auto-transformer of pressure regulation excitation |
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